Valve-controlled coupling



J. T. H. PATERSON. VALVE CONTROLLED COUPLING. APPLICATION FILED Nov. 17. 1917.

' Patented Feb. 24,1920.

if@ ATTORNEY of 'valve' mechanism.

the coupling.

PATENT oFFioE.

y JOHN T.' H. PATEBSON, 0F CHICAGO, ILLINOIS.

vALvEfcoNTnoLLED eoUrLINe.

Application led November To all whom it may concern:

Be it knownthat I,"J0HN T. H. PATigRsoN, a citizen ofthe United States, residing at Chicago, in the county of Cook and'Statel of Illinois, have' invented certainnew and useful yImprovements in Valve-Controlled Couplings, of which the following is a specication.

This invention has relation to coupling means for temporarily .effecting and opening a passage between a source of compressed air and a pneumatic vehicle tire.

The object of my invention is to provide an improved valve mechanism within such coupling means. A. further object is 4the provision of convenient means for operating the valve. "I also aim to provide an auxiliary valve mechanism Aso constructed and proportioned as to Ibecome effective the instant the primary valve mechanism becomes sufliciently worn to cause leakage of air through These ob]ects and the advantageous features of my invention are hereinafter clearly explained and illustrated Ain the appended drawings, of which:

Figure 1 is a cross sectional view showing a couplingl vembodying the invention,

Fig. 2 s ows one of the parts of the mechanism illustrated in Fig. 1, 't p y Figs. 3, 4. and 5i1lustrate modified forms Referringin the first instance to Fig. 1, the numeral 1 denotes the endl portion of a hose 'extending from a source of compressed air (not shown), and it. is shown fixed on a tubular nipple 2, which is inte ral with and forms part ofI my device. he body portion 3 of the device is' substantially cylindrical in shape and'it is, for convenient manipulation, 'disposed at right angles to the said nipple, whereby the lbore 4 of the latter communicates with the bottom portion ofv a concentric chamber 5 within the body 3. The said chamber is divided into three parts, first the bottom portion just mentioned, then the larger' threaded portion in which a threaded nut 6 is seated, and an-outer, `ilaring portion in which is placed a resilient gasket 7, which in turn is held in'place by ascrewcap 8'. p ,v w

The .nut 6 serves a double purpose. It holds an annular valve seat 9 in place against the shoulder 5a of the chamber, `and it is f' furthermore `formed with an inner chamber in which a plunger 10 is slidably fitted. In

yslpeeieition of Lettere raient. Patented Feb. 24, 1920.

17, 191'?. seriai'no. 202,563.

. the bottom portion of the chamber 5 is placed i a ball 11 which, by means of a coil spring 12,

is held yieldingly pressed against the annular'seat 9. Y

When the above described apparatus is placed on a tirel valve, the gasket 7 comes into contact with and closes tightly on to neously the tire valve .stem approaches, strikes and'advances the plunger 10, which in turn lifts the ball 11 away from the seat 9, thereby permitting air from its source to the casing of the said tire valve. Simultapass` the balland seat, thence through a se-A i I ries of grooves 10 of theplunger body 10b (see also Fig. 2) and finally throu h the gasket 7 and into the tire valve an tire. Upon removal from the tire valve-the spring 12 instantly're-seats the ball. y

The valve seat 9 is made of somewhat resilient material and its inner edge, on which the lball lodges, is well rounded. This makes an excellent valve because the ball, in

seating, tends merely to expand the seat wlthout cutting into it, as is the case in other for-ms of valves'used forv similar purposes. The 'plunger body 10b is slidably fitted-within the nut 6, while the stem clears both the perforation ofthe said nut, the an. nular valve seat, and the gasket 7. The ball, as explained, tends to expand the valve seat, and the tire tends to expand the gasket 7,r consequently there is no danger of closing or blocking the air passage 'at these places. The annular seat 9 is resilient, and

the ball Apressing* a ainst this seat soon closes the valve tig tl .f Increased pressure, which would ten to injure the seat, were it not resilient, merely causes it to yield somewhat until the ball forces the plungerI body against the shoulder of :the

nut 6, whereby a back-stop is formed which limitsthe pressure -of the ball against v'the seat. With lample and yet not excessive` pressure between the parts and with no cutting edges, this valve is air tight and remains so during the life of theparts.

The modification shown in Fig. 3 con` sists in adding an auxiliary valve by placing an annular disk 15, of resilient'mate? l.rial behind the plunger body 16.

v tingv surface of the latter` may be made with an annular ridge 16a, which becomes embedded in the said disk and thereby provides an airti ht joint. The parts are so proportioned t at this auxiliary valve nor- The abut- 5 mally remains open, and it is onlyy brought v into service by excessive pressure or when the primary valve seat 17 becomes so Worn that the ball 18 enters tooffar to seat properly and airtightly. This auxiliary valve' is open to the objection of cutting into the Valve seat, butbeing an emergency valve only, this drawback' is not so vital.

Nevertheless, in Fig.' 4 is shown a form of plunger 19, having'a conical surface for engagement with a flaring, conical seat 20. In this structure there are no sharp edges to cut the seat. y

In the modified structure illustrated in Fig. 5 the primary valvevremains as above described, except that the nut 21 is made somewhat larger so as to accommodate an auxiliar valve seat 22, having .the same rounde edges found on the valve seat 9. Infthis case the plunger body 23 is made with a semispherical surface 23al for engagement with the said seatI 22. Invthis 'structure all the excellent features lof the primary valve are retained and combined with the advantage of an auxiliarv valve mechanism. f

I claim: f

1. In' a^tire valve coupling, an annular resilient seat, a ball, a spring for normally holding the ball seated, a slidably fitted plunger within the coupling, for the purpose of unseating the ball, and a back-stop for the said plunger for the purpose of lim-i holding the ball seated, a plunger having a stem for unseating the ball and a grooved body fixed to slide Within the coupling, and a back-stop for the said plunger body for the purpose of limiting the pressure of the ball against its seat.

3. In a tire valve coupling, a casing having two valve seats disposed inthe same direction, a spring held ball normally pressed against the lirst seat, and a plunger for unseating the said ball, said plunger having a surface. for registration with the second valve seat.

4.? In a tire valve coupling, a casing, a threaded nut fitted into the casingfan/annular resilient valve seat supported by said nut, a. ball spring held aginst the said seat, a plunger slidably fitted Within the said nut for unseating the b`all and having air passages, anda second resilient seat placed within the nut for engagement with an an-v nular surface of the plunger.

In testimony whereof I have hereunto OI-INl T. H. PATERSON.

. affixed my signature. 

